//: containers/Groundhog.java
// Looks plausible, but doesn't work as a HashMap key.
package containers;

public class Groundhog
{
    protected int number;
    
    public Groundhog(int n)
    {
        number = n;
    }
    
    public String toString()
    {
        return "Groundhog #" + number;
    }
} /// :~
